ProgressBars和义式浓缩咖啡 | ProgressBars和义式浓缩咖啡

本文介绍了ProgressBars和义式浓缩咖啡的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

当我在运行某些意式浓缩咖啡测试时所显示的布局中有一个ProgressBar时，我会遇到:

When I have a ProgressBar in layouts that are displayed when running some espresso-tests - then I run into:

Caused by: android.support.test.espresso.AppNotIdleException: Looped for 1670 iterations over 60 SECONDS. The following Idle Conditions failed .

解决此问题的一种好方法是什么?发现了一些骇人听闻的东西，但正在寻找一种好方法

What is a nice way to work around this? Found some hackish things but searching for a nice way

推荐答案

如果在测试开始时ProgressBar不可见，则Drawable可以用自定义的ViewAction替换:

If the ProgressBar is invisible when the test starts, the Drawable can be replaced with by a custom ViewAction:

// Replace the drawable with a static color
onView(isAssignableFrom(ProgressBar.class)).perform(replaceProgressBarDrawable());

// Click a button (that will make the ProgressBar visible)
onView(withText("Show ProgressBar").perform(click());

自定义ViewAction:

public static ViewAction replaceProgressBarDrawable() {
    return actionWithAssertions(new ViewAction() {
        @Override
        public Matcher<View> getConstraints() {
            return isAssignableFrom(ProgressBar.class);
        }

        @Override
        public String getDescription() {
            return "replace the ProgressBar drawable";
        }

        @Override
        public void perform(final UiController uiController, final View view) {
            // Replace the indeterminate drawable with a static red ColorDrawable
            ProgressBar progressBar = (ProgressBar) view;
            progressBar.setIndeterminateDrawable(new ColorDrawable(0xffff0000));
            uiController.loopMainThreadUntilIdle();
        }
    });
}

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